Nut-lock



(No Model.)

' M. M. BEEMAN.

NUT LOGK.,.

No. 270,372. Patented Jan. 9,1883.

/F/G. Z

Parent Price.

MARCUS M. BEEMAN, OF SYRAOUSE, NEV YORK.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 270,372, dated January 9,

Application filed April 3, 1882.

To all whom it may concern Be it known that I, MARCUS M. BEEMAN, of Syracuse, Onondaga county, New York, have invented a new and useful Improvement in Nut-Locks, of which the following is a specication, reference being had to the accompanyingdrawings, in which- Figure 1 is a perpendicular transverse section thereof-as applied to a iish-platejoint; Fig. 2, a perspective view ofthe nut; Fig. 3, a top plan view ofthe washer. j

My invention relates to that kind oflock-nuts which contain in themselves a device for securely locking the nut when screwed up, and which can be readily unlocked.

Itconsists in the insertion of a hook-headed externally-projecting spring-bolt perpendicularly through the body of the nut from one face to the other, the projecting end of thc inner portion of the bolt fitting into one of a series ofholes or slots in a rectangular washer, the hook-shaped external head furnishing a ready meansfor unlocking the nut when locked, and holding back the locking-bolt as desired, and so keeping the nut unlocked.

`1t is constructed as follows:

A is the nut.

B is the spring locking-bolt, inserted in a recessed aperture extending perpendicularly through the nut from one face tothe other. This is constructed with a shank, a, an internal head, b, and an external hook or hookshaped head, 0, and with the spring d around the shank. The internalhead, b, may be made of plain cylindrical form, or with one side beveled oft', as shown in the drawings, somewhat similar toa spring latch-bolt. The hook c is made by bending over the outer end of the shank a, usually after its insertion into the aperture in the nut. The hook should be at least as long as the distance the head b projects beyond the inner face of the nut. The point of the hook is usually squared oti'; or it may be slightly beveled. When the head b projects below the nut the hook c is in such position that that part of the nut between the (No model.)

and when drawn back far enough the hook c and the whole bolt are twisted around sidewise until the point ofthe hook rests upon the outer face ofthe nut on one side or the other of the the bolt: The'bolt H is inserted through the fish-plates and rail, and the washer C put on over the projecting end of the bolt and pushed back against the [ish-plate, its lower edge lying upon the lower flange ofthe fish-plate or'upon the base ofthe rail. Then the nut A, with the springbolt B drawn back and held there, as before described, is screwed upon the bolt until about the extreme point to which it can be turned is reached. 'lhen the spring-bolt B is released by twisting it back until the hook c cannot rest upon the outer face of the nut. The spring d then throws the bolt inward, and, if in proper position, into one of the holes min the washer, and, ifnot, then the end of the bolt rests upon the washer until as the nut is tightened up the end of the bolt slips into a hole in the washer. This locks the nut against any backward turning ofthe nut. The operation is exactly the saine when the washer C is not {ish-plate to receive the inner head, b, of the bolt. To remove the nut 1 draw back the bolt and hold it back by twisting it around, as before described, and then u nscrew the unlocked nut.

[am aware that spring locking-bolts inserted either sidewise or perpendicularly through a nut have been used heretofore; but I am not aware that a locking-bolt made with a hookshaped externallyprojecting head, by means of which the locking-bolt can'be drawn back and held back by twisting 1t part way around, as I have described, has ever been used. Hence I only claim my specitic device for locking a nut.

What I claim as my invention, and desire to secure by Letters Patent, is

used, and holes or slotsare prepared in the IOO through the body Ot the nut, in combination with the bolt H and perforated washer U, tting` over the holt H, when constructed and operating together substantially as and for i5 the purposes set forth.

In witness whereof I have hereunto set my hand this 14th day of March, 1852.

MARCUS M. BEEMAN.

1.' In a nnt'lock, the combination of the locking-bolt B, constructed with an internal head, l h, shank a, with spring` d fitting loosely thereon, and an externally-projecting hook-shaped head, c, with the nut A, all constructed and l operating together substantially as described.

2. In a nur. lock, the nutA, having thelocliing-holt B, constructed with the internal head, b, shank al, carrying the spiral extensor-spring \Vitnesses:

I U. W. SMITH,

d, and the externally-projectinghook-shaped GEO. F. Hmm.

head c, fitting loosely in a recessed aperture 

